Singh, R. B. (1974). Bio-gas plant: Generating methane from organic wastes. Gobar Gas Research Station.
Čikaški stil citiranja (17. izdanje)Singh, Ram Bux. Bio-gas Plant: Generating Methane from Organic Wastes. Ajitmal, Etawah: Gobar Gas Research Station, 1974.
MLA način citiranja (8. izdanje)Singh, Ram Bux. Bio-gas Plant: Generating Methane from Organic Wastes. Gobar Gas Research Station, 1974.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.